Upgrade from 6 to 8

Upgrade from 6 to 8

After the upgrade from 6 to 8, when I run the application, all advanced queries with EXEC "Store Procedure" give an error: "Could not find stored procedure". But If I open one eSpace and test one advanced query it works well.

No. I didn't move the database to another server and I didn't change the runtime users. I just followed the checklist. Because that I don't understand what happened.
At runtime, all advanced queries using tables work well but advanced queries executing store procedures give errors. And tables and store procedures share the same database.